<template>
  <div>
    <!-- 面包屑列表区域 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区 -->
    <el-card>
      <!-- 输入框，按钮区域 -->
      <el-row :gutter="20">
        <el-col :span="7">
          <el-input
            placeholder="请输入内容"
            v-model="queryInfo.query"
            class="input-with-select"
            clearable
            @clear="getGoodsList()">
            <el-button slot="append" icon="el-icon-search" @click="getGoodsList()"></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
          <el-button type="primary" @click="goAddPage">添加列表</el-button>
        </el-col>
      </el-row>

      <!-- 商品列表区域 -->
      <el-table :data="goodsList" border stripe>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>

        <el-table-column prop="goods_name" label="商品名称"></el-table-column>
        <el-table-column prop="goods_price" label="商品价格（元）" width="110px"></el-table-column>
        <el-table-column prop="goods_weight" label="商品重量" width="70px"></el-table-column>
        <el-table-column prop="add_time" label="创建时间" width="140px">
          <template slot-scope="scope">
            {{scope.row.add_time | dateFormat}}
          </template>
        </el-table-column>
        <!-- 操作区域 -->
        <el-table-column label="操作" width="130px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit"></el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete" 
              @click="removeById(scope.row.goods_id)">
            </el-button>
          </template>
        </el-table-column>
        
      </el-table>

      <!-- 分页区域 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[5, 10, 15, 20]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total" background>
    </el-pagination>
    </el-card>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 查询参数对象
      queryInfo: {
        query: '',
        pagenum: 1,
        pagesize: 10
      },
      // 商品列表的数据
      goodsList: [],
      // 总条数
      total: 0
    }
  },

  created() {
    this.getGoodsList()
  },

  methods: {
    async getGoodsList() {
      const { data: res } = await this.$http.get('goods', { params: this.queryInfo })

      if (res.meta.status !== 200) return this.$message.error('获取商品列表失败！')

      this.$message.success('获取商品列表成功！')
      // console.log(res.data)
      this.goodsList = res.data.goods
      this.total = res.data.total
    },
    // 每页展示的页数发生改变时触发的函数
    handleSizeChange (newSize) {
      this.queryInfo.pagesize = newSize
      this.getGoodsList()
    },
    // 当前页码发生改变时触发此函数
    handleCurrentChange (newPage) {
      this.queryInfo.pagenum = newPage
      this.getGoodsList()
    },
    // 删除商品
    async removeById(id) {
      const confirmResult = await this.$confirm('此操作将永久删除该商品, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      // 'confirm' 要加单引号，否则代码走不进去
      if (confirmResult !== 'confirm') return this.$message.info('已经取消删除')

      const { data: res } = await this.$http.delete(`goods/${id}`)

      if (res.meta.status !== 200) return this.$message.error('删除商品失败！')

      this.$message.success('删除商品成功！')
      this.getGoodsList()
    },
    goAddPage () {
      this.$router.push('/goods/add')
    }

  }
}
</script>

<style lang="less" scoped></style>
